Gaithersburg, MD Landscaping Rules: Grass Height Limits (2026)

Montgomery County Code Chapter 26 (Section 26-9, subsection b, paragraph 5) establishes the 12-inch maximum height standard for grass, weeds, and rank vegetation on residential, commercial, and vacant properties throughout the county, including all areas within Gaithersburg city limits. This standard applies to front yards, side yards, rear yards, tree lawns (the strip between sidewalk and curb), and any other open ground on the property. The enforcement process begins when a complaint is filed by a neighbor, community association, or city staff, or when a code enforcement officer identifies a violation during routine patrol. The property owner receives a written notice specifying the violation and a compliance deadline, typically 7 to 14 days depending on the severity and weather conditions. The notice is sent to the property address and, if different, to the owner's mailing address on file with the Maryland SDAT property tax records. If the owner fails to correct the violation within the compliance period, the city or county may arrange for a contractor to mow the property. The cost of abatement is billed to the property owner, and if unpaid, the amount becomes a lien against the property that can be collected through the annual county tax sale. DHCA handles enforcement for rental properties under the county rental licensing program, while Gaithersburg's Neighborhood Services division (301-258-6340, Neighborhoods@gaithersburgmd.gov) handles owner-occupied residential and commercial properties within city limits. Vacant lots are subject to the same 12-inch standard and are frequently inspected during the growing season (April through October), as unmaintained lots can harbor rodents, ticks, and mosquitoes that affect neighboring properties. Properties in foreclosure or estate proceedings are particularly prone to vegetation violations, and the city will pursue the lien process to recover abatement costs even on properties with complex ownership situations. Many HOA communities throughout Gaithersburg impose stricter grass height standards (often 6 to 8 inches) through their community covenants, and HOA enforcement operates independently of city and county code enforcement. The city encourages residents to report overgrown properties promptly, as early intervention prevents more serious pest and safety issues from developing.